Crushing-roller.



J. G. REID.

ORUSHING ROLLER.

APPLICATION FILED SEPT. s, 1910.

1, 1 08, 8.50, Patented Aug. 25, 1914.

WITNESSEEIS- INVEJNTEJR- ATTORNEY.

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JAMES C. REID, 0F BLUEFIELDS, NICARAGUA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ALLIS-CHALMERS IIIANUFAOTURING COMPANY, A CORPORATIDN OF DELAWARE.

CRUSI-IING-ROLLER.

Application filed September 3, 1910.

To all whom it may concern Be it known that l, JAMES C. REID, a citizen of the Republic of Nicaragua, re siding at Bluefields, in Mosquito P eservatron and Republic of Nicaragua, have invented a certain new and useful Improvement 1n Crushing-Rollers, of which the followmg is a specification.

lhis invention relates to improvements in the construction of crushing rollers for use in the type of mills in which an annular series of pivotally suspended rollers are revolved within a pan, such as the well known Huntington and Chilean types of crushmg mills.

he object of the invention is to prov1de a crushing roller which is simple and durable in its construction and etlicient in its operation.

In the construction of crushing rollers for use in Huntington or Chilean mills it has heretofore been customary to close the cavity formed in the roller, in which a thrust bearing is formed, by means of a plate or cap which was bolted to the roller head, see Huntington 427,690. Since the cavity 1n which the thrust bearing is formed is filled with oil, it is essential to have the joint between the cap and roller head as tight as possible so as to prevent the flow of any of the oil from the cavity to the material being crushed. With the use of bolts as a fastening means it has been found 1mpossible to maintain a sufficiently tight oint to prevent such leakage of oil, and 1t is a feature of the present invention to overcome this difficulty.

A clear conception of one embodiment of the invention can be obtained by referring to the accompanying drawing in winch like reference characters designate the same parts in different views.

Figure 1 shows a central vertical section through a crushing roller such as s used in the Huntington type of null. Fig. 2 1s a transverse horizontal section of the devlce shown in Fig. 1, the section being taken along the line ll1l looking in the direction of the arrows.

The roller supporting shaft 1, having the enlarged end portion 7, is centrally mounted within the roller head 3 and the upwardly projecting portion 2 formed thereon. The cavity 11 formed 1n the central portion of the head 3 is hexagonal in shape.

Specification of Letters Patent.

Patented Au 25, 1914.

Serial No. 580,324.

The hexagonal washer or plate 0 closely fits the vertical walls of the cavity 11 and has a central hole formed therein which permits the passage of the shaft 1 therethrough. The bearing plate 8, which is usually constructed of bronze or other suitable Wearing material, has an outside diameter about equal to that of the enlarged portion 7. The plate 8 coacts with its upper surface against the lower surface of the hexagonal plate (3, and with its lower surface against the upper surface of the enlarged portion 7. The cavity 11 is closed by means of a pipe plug 9 which screws directly into theend of the roller head 8. Holes 10 permit the insertion and removal of the plug 9 into and from the head 8. Suitable means other than the plug 9 might be substituted therefor, but in any event the use of bolts or similar means of fastening should be avoided. The holes 10 might also be replaced by outwardly projecting pins or by other suitable means for permitting the insertion or removal of the plug 9.

The crushing wearing ring 5 surrounds the roller 3 and is fastened thereto by means of wedge blocks l which are inserted between the peripheral surface of the head 3 and the interior surface of the ring 5. These wedge blocks a are usually constructed of wood or similar material.

During the operation of the roller, the supporting shaft 1 is suspended at its upper end, being fixed relative to the crusher frame. The crusher frame is rotated, causing the shaft 1 to traverse a circular course. The periphery of the ring 5 is forced in contact with an annular crushing ring by the action of centrifugal force, and causes the roller head 3 to rotate about the shaft 1. The general construction of crushing mills of this type is well known to persons skilled in the art and forms no part of the present invention. See Huntington L2? ,690.

During the operation of the mill the cavity 11 is filled with oil which lubricates the surfaces between the plates 6, 8, and the plate 8 and enlarged portion 7. By using a plug 9 to form a closure for the cavity 11, the possible occurrence of leakage of oil from within the cavity 11 is prevented, since the screw thread coaction between the plug 9 and the head 3 can easily be formed liquid tight. The use of the plug 9, moreover, forms a simple construction, there being only one piece necessary to form the closure for the cavity 11.

It will be noted that the construction need not necessarily be applied to the roller of a It should be understood that it is not'drF" siredto be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In a crushing roller, a shaft having an enlarged end, a roller head having a cavity and a through bore for receiving said enlarged end and shaft, said cavity being screw-threaded, and a solid tapered screwthreaded plug for closing said cavity, said plug having means for screwing same into said head and the outer surface of said plug when screwed home being substantially flush with the bottom of said roller head, and said screwing means lying entirely within said outer surface of said plug.

2. In a crushing roller, a shaft having an enlarged end, a roller head having a cavity for receiving said enlarged shaft end, a bearing plate between said roller head and said shaft end, said head and said bearing plate being formed for locking said bearing plate to said head, and a solid screw-threaded plug for closing said cavity in said head, said plug having means for screwing same into said head and the outer surface of said plug being substantially flush with the bottom of said roller head, and said screwing means lying entirely within said outer surface of said plug.

In testimony whereof, I affix my signature in the presence of two witnesses.

' JAMES C. REID.

"Witnesses H. CHAFRUT, J. G. BOLTEN.

' Copies of this patent inay be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

